KR100918174B1 - Floating piston valve of amplitude selective shock absorber - Google Patents

Floating piston valve of amplitude selective shock absorber Download PDF

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Publication number
KR100918174B1
KR100918174B1 KR1020080069249A KR20080069249A KR100918174B1 KR 100918174 B1 KR100918174 B1 KR 100918174B1 KR 1020080069249 A KR1020080069249 A KR 1020080069249A KR 20080069249 A KR20080069249 A KR 20080069249A KR 100918174 B1 KR100918174 B1 KR 100918174B1
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KR
South Korea
Prior art keywords
valve
coupling
shock absorber
piston valve
annular
Prior art date
Application number
KR1020080069249A
Other languages
Korean (ko)
Inventor
박경원
지영춘
Original Assignee
주식회사 만도
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Priority to KR1020080069249A priority Critical patent/KR100918174B1/en
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Publication of KR100918174B1 publication Critical patent/KR100918174B1/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32Details
    • F16F9/50Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
    • F16F9/512Means responsive to load action, i.e. static load on the damper or dynamic fluid pressure changes in the damper, e.g. due to changes in velocity
    • F16F9/5126Piston, or piston-like valve elements

Abstract

A flow piston valve of a displacement variable shock absorber is provided to secure the installation space of a tripod type plate valve spring between a valve body and a connecting body. A flow piston valve of a displacement variable shock absorber is composed of a cylinder(110), a piston rod(120), a fixing piston valve(130), a flow piston valve(140), and a stopper(150). The piston rod is installed in the cylinder to be moved in the axial direction. The fixing piston valve is fixedly mounted on the piston rod, and divides the space of the cylinder into an extension chamber and a compression chamber. The flow piston valve is mounted on the piston rod in the extension chamber to be movable axially. The stopper is fixed on the piston rod of the upper part of the flow piston valve.

Description

Flow piston valve of variable displacement shock absorber {FLOATING PISTON VALVE OF AMPLITUDE SELECTIVE SHOCK ABSORBER}

The present invention relates to a flow piston valve of a shock absorber that attenuates vibration transmitted to a vehicle according to the condition of a road surface, and more particularly, a low damping force characteristic during input of high frequency vibration, which is a small and frequent vibration, to reduce the ride comfort of a vehicle. It relates to a flow piston valve of the variable displacement shock absorber to improve the pressure.

In general, the vehicle is provided with a shock absorber to cushion the shock or vibration received by the axle on the road surface to improve the riding comfort, the shock absorber is used as one of such shock absorbers. The shock absorber is installed between the axle and the body and includes a cylinder in which the piston rod is movable. In addition, the inside of the cylinder is filled with a buffer medium such as gas or oil, and a damping force is generated in the process of moving the oil by the piston valve installed at the end of the piston rod.

As such, the general shock absorber has a limitation in that it has a certain damping force characteristic with respect to the road surface or the attitude change of the vehicle. Accordingly, when the damping force characteristic is lowered, the riding comfort can be improved, but the attitude of the vehicle could not be stably maintained. On the contrary, when the damping force characteristic is increased, the attitude of the vehicle can be stably maintained, but the riding comfort becomes worse. Therefore, the damping force characteristic of the shock absorber cannot be adjusted with respect to the road surface or the attitude change of the vehicle.

Therefore, in order to solve the problem of the general shock absorber, a displacement variable shock absorber that can vary the damping force characteristics according to the displacement of the piston rod has been developed.

1 is a cross-sectional view showing a portion of a displacement variable shock absorber capable of varying damping force characteristics according to the displacement of a piston rod of the prior art.

As shown in FIG. 1, a conventional displacement variable shock absorber is fixedly fixed on a cylinder 10, a piston rod 20 axially movable within the cylinder 10, and a piston rod 20. A fixed piston valve 30 mounted to partition the space in the cylinder 10 into a tension chamber and a compression chamber, and a floating piston valve movably mounted axially on the piston rod 20 in the tension chamber ( 40).

The stopper 50 is fixed on the piston rod 20 of the upper part of the flow piston valve 40. A return spring 60 and a stop spring 70 are interposed between the flow piston valve 40 and the fixed piston valve 30, and between the flow piston valve 40 and the stopper 50, respectively.

As shown in detail in FIG. 2 and FIG. 3, the flow piston valve 40 of the conventional displacement variable shock absorber includes an annular valve body 41 in which a fluid passage hole 41a is formed, and the valve body 41. A pair of upper and lower valve discs 43 installed above and below the upper and lower valve discs 43 and upper and lower valve discs 43 to generate a damping force, respectively. By being coupled to the valve body 41 at the upper and lower pairs of the coil wave type valve springs 45 and the upper and lower coil wave type valve springs 45 of the upper coil wave type valve spring 45, respectively. A pair of upper and lower coupling supports 47 for holding the valve disk 43 and the coil wave-shaped valve spring 45 between the valve body 41 are included.

By the way, conventionally, the coupling support body 47 is comprised from the annular support part 47a and the coupling part 47b formed in the inner edge of this annular support part 47a, and the coupling part 47b of the valve body 41 is carried out. Since the inner diameter of the valve body 41 is inserted into the inner diameter of the valve body 41 while being in contact with the inner diameter, the inner diameter of the valve body 41 is the thickness of the coupling portion 47b of the coupling support 47. It can only grow as big. Therefore, in the related art, the portion where the annular portion of the valve body 41 and the annular support portion 47a of the coupling support 47 face each other becomes smaller by the larger inner diameter of the valve body 41, so that the width of the valve disc 43 is improved. Since the valve body 41 becomes smaller by the larger inner diameter of the valve body 41, it is a valve spring that is installed between the valve body 41 and the coupling support 47 to press the valve disc 43. There is a problem in that a coil wave type valve spring that can be installed in an expensive but narrow area without using a plate valve spring is required.

Accordingly, the present invention is to solve the problems of the prior art, the flow of the variable displacement shock absorber configured to secure the area that can be installed between the valve body and the coupling support the low-cost valve spring having a triangular plate shape It is an object to provide a piston valve.

In order to achieve the above object, the present invention is a flow piston valve of a variable displacement shock absorber capable of varying the damping force characteristics according to the displacement of the piston rod, an annular valve body having a fluid passage hole, and the A pair of upper and lower valve discs installed above and below to generate a damping force, and a pair of valve springs of upper and lower pairs of triangular plate installed at an upper portion of the upper valve disk and a lower portion of the lower valve disk to press the valve disks. And retaining the valve discs and the triangular valve springs between the valve body by being coupled to a valve body respectively at an upper portion of the upper triaxial valve spring and at a lower portion of the lower triaxial valve spring. And a pair of upper and lower binding supports, wherein the binding support is an annular support. And it is composed of a coupling part formed on an outer edge of the ring-shaped support portion, and the engaging portion is configured to pass through the outer edge portion of the valve body is fastened to the valve body.

As described above, according to the flow piston valve of the variable displacement shock absorber of the present invention, the engaging portion of the coupling support penetrates the annular valve body through a portion of the outer edge of the valve body, so that the width of the valve body and the valve disc is small. Since it is not supported, the valve spring is installed between the valve body and the coupling support to press the valve disk, there is an effect that can be used in the low-cost but tri-trip valve spring that requires a large installation area.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

Figure 4 is a cross-sectional view showing a part of the variable displacement shock absorber according to an embodiment of the present invention. As shown, the variable displacement shock absorber according to the embodiment of the present invention includes a cylinder 110, a piston rod 120 axially movable within the cylinder 110, and on the piston rod 120. A fixed piston valve 130 fixedly mounted to partition the space in the cylinder 110 into a tension chamber and a compression chamber, and a flow piston valve 140 movably mounted axially on the piston rod 120 in the tension chamber. And a stopper 150 fixed on the piston rod 120 at the top of the flow piston valve 140. In FIG. 4, illustration of the return spring and the stop spring is omitted.

5 is a perspective view of the flow piston valve of the variable displacement shock absorber according to an embodiment of the present invention, Figure 6 is a cross-sectional view of Figure 5, Figure 7 is an exploded view of FIG. As shown, the flow piston valve 140 of the variable displacement shock absorber according to the present embodiment, an annular valve body 141, a pair of upper and lower valve disks 143, and a pair of upper and lower tricycles It includes a plate-shaped valve springs 145 and a pair of upper and lower coupling supports 147.

The annular valve body 141 is formed with a fluid passage hole 141a for passing the fluid up and down the flow piston valve 140.

The upper and lower pair of valve disks 143 are installed above and below the valve body 141 to generate a damping force.

The upper and lower pair of triangular valve springs 145 are respectively installed at the upper portion of the upper valve disk 143 and the lower portion of the lower valve disk 143 to press the valve disks 143.

The upper and lower pairs of the coupling supports 147 are respectively coupled to the annular valve body 141 at the upper portion of the upper tricycle plate-shaped valve spring 145 and the lower tricycle plate-shaped valve spring 145 to form a valve body ( The valve discs 143 and the triangular plate-shaped valve springs 145 are retained between 141.

The engagement support 147 is comprised from the annular support part 147a and the engagement part 147b formed in the outer edge of this annular support part 147a.

The coupling part 147b is coupled to the valve body 141 by passing through a portion of the outer edge of the valve body 141, and is coupled to the valve body 141 by the coupling ring 149.

The outer peripheral surface of the annular valve body 141 is formed with a vertical insertion groove 141b for the coupling portion through which the coupling portion 147b is inserted.

In addition, the outer peripheral surface of the valve disk 143 is formed with a coupling portion insertion groove 143a through which the coupling portion 147b is inserted.

The outer side of the coupling portion 147b is formed with a coupling ring insertion groove 148 into which the coupling ring 149 is inserted.

The outer circumferential surface of the annular valve body 141 is formed with a coupling ring outer circumferential insertion groove 141c into which the coupling ring 149 is inserted.

The outer circumferential surface of the coupling ring 149 is in close contact with the inner circumferential surface of the cylinder 110, and although not shown in detail in the drawing, the Teflon band is attached to the outer circumferential surface of the coupling ring 149 to fix the piston valve 130 of the cylinder 110. It can be moved up and down sealingly with respect to the inner peripheral surface.

In the present invention, the engaging portion 147b formed at the outer edge of the annular support portion 147a of the engaging support 147 is fastened to the annular valve body 141 by passing through a portion of the outer edge of the valve body 141. In addition, the inner diameter of the valve body 141 is not larger than the thickness of the coupling portion 147b of the coupling support 147, and the outer diameter of the valve body 141 is smaller than the thickness of the coupling portion 147b of the coupling support 147. There is no support. Therefore, in this invention, the part which the annular part of the valve body 141 and the annular support part 147a of the engagement support 147 do not become small, and the width | variety of the valve disc 143 does not become small, As a valve spring provided between the body 141 and the coupling support 147 to press the valve disk 143, a triangular valve spring having a low cost but requiring a large installation area can be used.

In addition, the washer 144 for adjusting the damping force may be interposed above and below the triangular plate-shaped valve spring 145.

In addition, a guide ring 146 may be interposed in the annular support 147a of the coupling support 14.

While the invention has been described above with reference to specific embodiments, various modifications, changes or modifications may be made in the art within the spirit and scope of the appended claims, and thus, the foregoing description and drawings It should be construed as illustrating the present invention rather than limiting the technical spirit of the present invention.

1 is a cross-sectional view showing a portion of a displacement variable shock absorber capable of varying damping force characteristics according to the displacement of a piston rod of the prior art.

2 is a cross-sectional view of the flow piston valve of the variable displacement shock absorber of FIG.

3 is an exploded perspective view of the flow piston valve of the variable displacement shock absorber of FIG.

Figure 4 is a cross-sectional view showing a part of the variable displacement shock absorber according to an embodiment of the present invention.

5 is a perspective view of the flow piston valve of the variable displacement shock absorber according to the embodiment of the present invention.

6 is a cross-sectional view of FIG. 5.

7 is an exploded view of FIG. 5.

<Description of Signs of Major Parts of Drawings>

141: valve body 143: valve disc

145: valve spring on the tricycle plate 147: coupling support

149: coupling ring

Claims (3)

  1. A floating piston valve of a variable displacement shock absorber that can vary the damping force characteristics according to the displacement of the piston rod.
    An annular valve body having a fluid passage hole, a pair of upper and lower valve disks disposed above and below the valve body to generate a damping force, and installed at an upper portion of the upper valve disk and a lower portion of the lower valve disk, respectively. A pair of upper and lower pair triangular valve springs for pressing the valve disks, and an upper portion of the upper triaxial plate spring and a lower portion of the lower triangular plate spring to engage with the valve body, respectively. And a pair of upper and lower coupling supports for holding the valve disks and the valve springs on the trivet plate,
    The coupling support is composed of an annular support and a coupling part formed at an outer edge of the annular support, wherein the coupling part is fastened to the valve body through a portion of the outer edge of the valve body. Flow piston valve.
  2. The method according to claim 1,
    The coupling portion of the flow piston valve of the variable displacement shock absorber, characterized in that fastened to the valve body by a coupling ring.
  3. The method according to claim 2,
    The outer peripheral surface of the annular valve body is formed with a vertical insertion groove for the coupling portion through which the coupling portion is inserted,
    On the outer circumferential surface of the valve disk is formed a coupling groove for inserting the coupling portion,
    The outer side of the coupling portion is formed with a coupling ring insertion groove into which the coupling ring is inserted,
    The outer circumferential surface of the annular valve body flow piston valve of the variable displacement shock absorber, characterized in that the outer ring insertion groove for the coupling ring is formed is inserted.
KR1020080069249A 2008-07-16 2008-07-16 Floating piston valve of amplitude selective shock absorber KR100918174B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020080069249A KR100918174B1 (en) 2008-07-16 2008-07-16 Floating piston valve of amplitude selective shock absorber

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR1020080069249A KR100918174B1 (en) 2008-07-16 2008-07-16 Floating piston valve of amplitude selective shock absorber
DE102009033301A DE102009033301B4 (en) 2008-07-16 2009-07-15 Floating piston valve for an amplitude-selective shock absorber
US12/503,679 US8333270B2 (en) 2008-07-16 2009-07-15 Floating piston valve of amplitude selective shock absorber
CN200910160421XA CN101629611B (en) 2008-07-16 2009-07-16 Floating piston valve of amplitude selective shock absorber

Publications (1)

Publication Number Publication Date
KR100918174B1 true KR100918174B1 (en) 2009-09-17

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KR1020080069249A KR100918174B1 (en) 2008-07-16 2008-07-16 Floating piston valve of amplitude selective shock absorber

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US (1) US8333270B2 (en)
KR (1) KR100918174B1 (en)
CN (1) CN101629611B (en)
DE (1) DE102009033301B4 (en)

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CN102758873A (en) * 2011-04-29 2012-10-31 比亚迪股份有限公司 Damper
KR101254286B1 (en) * 2011-06-03 2013-04-12 주식회사 만도 Double sliding piston valve
JP5835986B2 (en) * 2011-07-27 2015-12-24 日立オートモティブシステムズ株式会社 Cylinder device
EP2685047A1 (en) 2012-07-13 2014-01-15 Alstom Technology Ltd Modular vane/blade for a gas turbine and gas turbine with such a vane/blade
KR102138819B1 (en) * 2013-05-02 2020-07-28 라이드 컨트롤, 엘엘씨 Compression-resistant shock absorber piston seal
DE102014227039A1 (en) * 2014-12-30 2016-06-30 Siemens Aktiengesellschaft Lubricant collecting device

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KR100276216B1 (en) 1995-12-30 2000-12-15 정몽규 Device for controlling damping pressure of shock absorber

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KR930025977U (en) * 1992-05-15 1993-12-24 만도기계 주식회사 Automotive shock absorber damping valve
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KR19990048572A (en) * 1997-12-10 1999-07-05 오상수 Shock absorber piston valve structure

Also Published As

Publication number Publication date
CN101629611B (en) 2011-01-26
DE102009033301B4 (en) 2013-11-28
DE102009033301A1 (en) 2010-01-21
US20100012450A1 (en) 2010-01-21
US8333270B2 (en) 2012-12-18
CN101629611A (en) 2010-01-20

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